Mechanism for automatically operating exhaust-valves on explosive-engines.



PATENTED JULYZ 1907.

J. D.ISI-LBERZ AHN.' MECHANISM FOR AUTOMATICALLY OPERATING EXH-AUST-VALVES 0N EXPLOSIVE ENGINES. APPLIOATIOH FILED un.2a,1so1.

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JOHN D. SILBERZAHN, OF MARINETTE, WISCONSIN.

MECHANISM FOR AUTOMATICALLY OPERATING EXHAUST-VALVES ONEXPLOSIVE-ENGINES.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed January 28, 1907. Serial No. 354,445.

To all whom it may concern:

Be it known that 1, JOHN D. SILBERZAHN, a citizen of the United States,residing at Marinette, in the county of Marinette and State ofWisconsin, have invented certain new and useful Improvements inMechanism for Automatically Operating Exhaust Valves onExplosive-Engines, of which the following is a specification.

This invention relates to improvements in mechanism for automaticallyoperating exhaust valves on explosive-engines, to allow the discharge ofthe pressure in the engine cylinder at the proper time, which mechanismwill be simple in its construction and easy of operation.

I attain these objects by the mechanism and arrangement of partsillustrated in the accompanying drawings, in which Figure 1, is a sideview of the engine constructed in accordance with my invention, the mainshaft being in section. Fig. 2, is a longitudinal section of the mainparts of the engine showing the novel features on a larger scale. Fig.3, is a perspective view of the means for actuating the main valve.

In said drawings, A, indicates the cylinder or explosive chamber of anordinary explosion engine and B, the piston thereof which is adapted totravel in the cylinder A, approximately from 90 to x.

0, represents the crank-shaft, which is revolved by the pitman Y, whichis connected to the piston B, in any well-known manner.

D, is an exhaust chamber carrying the exhaust pipe said chamber D issubstantially part of the head E of the cylinder A, and is connectedtherewith by the passage F, which has its mouth beveled and forms a seatfor the valve G therein.

Through the wall of cylinder A I provide a small opening 11 locatedabove the position occupied by the piston B in its outer course. To saidopening is secured an auxiliary cylinder 10 having a solid piston 9therein. Said piston has a grooved head that acts as a support and guidefor an exhaust valve rod 4. A hanger 12 is secured to some stationarypart of the engine to guide and retain in proper position the cam rod 6.Said rod 6 has in its end a notch and shoulder 5 to enter into alinementwith the end of the valve rod 4. The cam rod 6 carries at one end abearing pin 21 for a roller 15 which bears constantly against a cam 17on the crank shaft 0, said roller bearing pin 21, being also guided by apivoted arm 16. Upon the cam rod 6, is also placed a coiled spring 8,one end of which bears against the hanger 12, and the other end againsta collar 13, mounted upon said cam rod 6, and secured thereto by a pin14. The cam 17 and the cam rod 6, when connected by the notch 5, as inFig. 3, pushes the valve rod 4, ahead, and said rod 4, being connectedto the stem 20 of the valve Gr, by the pivoted rod 19, it pushes saidvalve G into the cylinder A and makes an opening for exploded gases orpressure to escape through the passage F and the exhaust pipe D.

After the piston B has traveled back into the cylinder A toward thepoint x; and after uncovering the opening 11; and the opening 18, in theside or" the piston B, near its outer end reaches opposite the opening11, the pressure in the auxiliary cylinder 10, escapes through saidopening 18. As there is then no force in the cylinder 10, the piston 9,is returned to place by a small spring 22, that may be attached to anypart of the engine; the piston 9 being then ready for another explosion.The piston 9, in returning to place draws the valve rod 4 out of linewith the notch 5 in the cam rod 6, and this permits the coil spring 20on the rod of the valve G-to return said valve G to place, so that itcloses the opening F, and the cylinder A is ready for another explosion.The valve rod 4, cannot pass out beyond the point of the cam rod 6, assaid point of the cam rod 6, in its travel never frees the point of thevalve rod 4.

Having now fully described my invention, I claim:

1. In an automatic mechanism for opening the exhaust valve of anexplosive engine, the auxiliary cylinder 10 and the solid piston 9therein, the outer head of said piston being circumferentially grooved,the valve rod 4 straddling the reduced portions of the head, and thespring 22 bearing against the outer end of the head, substantially asdescribed.

2. In a device of the class described, the combination of the auxiliarycylinder 10, the solid piston 9, therein having its outer headcircumferentially grooved to form a neck therein, the valve rod 4longitudinally grooved to straddle said neck and the spring 22 hearingagainst the outer end of the head, substantially as described.

3. In an exhaust valve operating device, the combination of the cylinderA, the auxiliary cylinder 10, and its piston 9, the exhaust valve G inline with the end of the cylinder A, the valve stem 20, the pivotedlever 19, and the valve rod 4, having one end straddling thecircumferentially grooved head of the piston 9 of the auxiliarycylinder, substantially as described.

4. In an exhaust valve operating device, the combination of the cylinderA, the auxiliary cylinder 10, its piston 5), having its headcircumferentially grooved to form a neck therein, the valve rod 4,having one end straddling said neck, the cam rod 6, having a notch inone end to receive the point of the valve red, the pivot pin 21,projecting laterally from the other end of the rod 6, and the pivotedarm 16, supporting the opposite end of the pivot pin 21, substantiallyas described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN D. SILBERZAHN.

Witnesses:

ADELINE PnATT, F. N. BERNORDY.

